Automatic conversion of source code from 32-bit to 64-bit
View Patent ↗In accordance with methods and systems consistent with the present invention, a system that automatically generates 32-bit to 64 bit interfaces to 64-bit code is provided. These interfaces provide for the use of optional parameters and, because they are written in 64-bit code, also allow for parameter checking. These interfaces are automatically generated to allow a programmer to maintain compatibility with 64-bit libraries from 32-bit source code.
1. A method in a data processing system, comprising the steps of:
receiving 32-bit source code;
generating, from the 32-bit source code, a 32-bit interface file including statements describing characteristics of parameters in the 32-bit source code, wherein generating a 32-bit interface file includes invoking an interface generator that:
scans the 32-bit source code and creates the interface file according to a definition; and
adds to the interface file the statements describing characteristics of the parameters by parsing the 32-bit source code; and
automatically generating, based on the statements in the 32-bit interface file, a 32-bit to 64-bit conversion stub that is used by the 32-bit source code to invoke 64-bit code, wherein automatically generating a 32-bit to 64-bit conversion stub includes invoking a stub generator that:
reads the 32-bit interface file to populate a hash table with information identifying the parameters in the interface file;
re-reads the 32-bit interface file to populate the hash table with information indicating processing that occurs for the statements in the interface file; and
generates the 32-bit to 64-bit conversion stub using the hash table.
2. The method of claim 1 , wherein the 32-bit source code includes at least one of an integer parameter and a logical parameter and wherein generating a 32-bit interface includes:
determining whether the at least one of an integer and logical parameter has input directionality, output directionality, or input and output directionality; and
inserting into the 32-bit interface file code generator statements corresponding to the determined directionality of the at least one parameter.
3. The method of claim 1 , wherein generating a 32-bit interface file includes:
adding to the interface file statements indicating a number of dimensions of at least one parameter and a number of elements in each dimension.
4. The method of claim 1 , wherein the characteristics include an indication of a conditional value for at least one of the required parameters.
5. The method of claim 1 , wherein the characteristics include an indication of whether at least one of the required parameters is used to contain a return value.
6. The method of claim 1 , wherein the characteristics include a directionality of at least one of the required parameters.
7. The method of claim 1 , wherein the characteristics include an indication of whether at least one of the required parameters returns a multidimensional variable.
8. The method of claim 1 , wherein the characteristics include an indication of whether a size of at least one of the required parameters is based on another one of the required parameters.
9. The method of claim 1 , wherein the characteristics include an indication of whether at least one of the required parameters is a work space parameter.
10. A computer-readable memory device containing instructions for controlling a data processing system to perform a method comprising the steps of:
receiving 32-bit source code;
generating, from the 32-bit source code, a 32-bit interface file including statements describing characteristics of parameters in the 32-bit source code, wherein generating a 32-bit interface file includes invoking an interface generator that
scans the 32-bit source code and creates the interface file according to a definition; and
adds to the interface file the statements describing characteristics of the parameters by parsing the 32-bit source code; and
automatically generating, based on the statements in the 32-bit interface file, a 32-bit to 64-bit conversion stub that is used by the 32-bit source code to invoke 64-bit code, wherein automatically generating a 32-bit to 64-bit conversion stub includes invoking a stub generator that
reads the 32-bit interface file to populate a hash table with information identifying the parameters in the interface file;
re-reads the 32-bit interface file to populate the hash table with information indicating processing that occurs for the statements in the interface file; and
generates the 32-bit to 64-bit conversion stub using the hash table.
11. The computer-readable memory device of claim 10 , wherein the 32-bit source code has a subprogram with a parameter and wherein generating a 32-bit interface file includes:
determining whether the parameter in the subprogram has input directionality, output directionality, or input and output directionality; and
inserting into the 32-bit interface file code generator statements corresponding to the determined directionality of the parameter in the subprogram.
12. The computer-readable memory device of claim 10 , wherein generating a 32-bit interface file includes:
adding to the interface file statements indicating a number of dimensions of at least one parameter and a number of elements in each dimension.
13. The computer-readable memory device of claim 10 , wherein the characteristics include an indication of a conditional value for at least one of the required parameters.
14. The computer-readable memory device of claim 10 , wherein the characteristics include an indication of whether at least one of the required parameters is used to contain a return value.
15. The computer-readable memory device of claim 10 , wherein the characteristics include a directionality of at least one of the required parameters.
16. The computer-readable memory device of claim 10 , wherein the characteristics include an indication of whether at least one of the required parameters returns a multidimensional variable.
17. The computer-readable memory device of claim 10 , wherein the characteristics include an indication of whether a size of at least one of the required parameters is based on another one of the required parameters.
18. The computer-readable memory device of claim 10 , wherein the characteristics include an indication of whether at least one of the required parameters is a work space parameter.
19. A data processing system comprising:
means for receiving 32-bit source code;
means for generating, from the 32-bit source code, a 32-bit interface file including statements describing characteristics of parameters in the 32-bit source code,
wherein the means for generating a 32-bit interface file includes means for invoking an interface generator that
scans the 32-bit source code and creates the interface file according to a definition; and
adds to the interface file the statements describing characteristics of the parameters by parsing the 32-bit source code; and
means for automatically generating, based on the statements in the 32-bit interface file, a 32-bit to 64-bit conversion stub that is used by the 32-bit source code to invoke 64-bit code, wherein the means for automatically generating a 32-bit to 64-bit conversion stub includes means for invoking a stub generator that
reads the 32-bit interface file to populate a hash table with information identifying the parameters in the interface file;
re-reads the 32-bit interface file to populate the hash table with information indicating processing that occurs for the statements in the interface file; and
generates the 32-bit to 64-bit conversion stub using the hash table.
20. The system of claim 19 , wherein the 32-bit source code includes at least one of an integer parameter and a logical parameter and wherein the means for generating a 32-bit interface includes:
means for determining whether the at least one of an integer and logical parameter has input directionality, output directionality, or input and output directionality; and
means for inserting into the 32-bit interface file code generator statements corresponding to the determined directionality of the at least one parameter.
21. The system of claim 19 , wherein the means for generating a 32-bit interface file includes:
means for adding to the interface file statements indicating a number of dimensions of at least one parameter and a number of elements in each dimension.
22. The system of claim 19 , wherein the characteristics include an indication of a conditional value for at least one of the required parameters.
23. The system of claim 19 , wherein the characteristics include an indication of whether at least one of the required parameters is used to contain a return value.
24. The system of claim 19 , wherein the characteristics include a directionality of at least one of the required parameters.
25. The system of claim 19 , wherein the characteristics include an indication of whether at least one of the required parameters returns a multidimensional variable.
26. The system of claim 19 , wherein the characteristics include an indication of whether a size of at least one of the required parameters is based on another one of the required parameters.
27. The system of claim 19 , wherein the characteristics include an indication of whether at least one of the required parameters is a work space parameter.